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Old 01-09-2010, 02:14 PM   #1
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Hot water baseboards noisy!


Is there any trick to reducing the amout of constant "pinging" noises emitted from hot water baseboards? Thanks.

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Old 01-09-2010, 02:42 PM   #2
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Hot water baseboards noisy!


A couple of things. Look to see how the elements are mounted. Make suer they are just setting on the brackets to allow for movement. Also you may be operating the water higher than needed if you are only controlling water temp by the boiler high limit. For example at -10 deg outside you may need 180deg water but as the temp gets warmer you dont need as hot of water to maintain the same comfort. But on a call for heat the boiler just runs up to full temp. You can eather controll manually by turning down the high limit or install a outdoor reset control. The less the water temp the less the expantion and contraction. Just a idea.
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Old 01-09-2010, 03:49 PM   #3
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Hot water baseboards noisy!


Thanks, John. Is there a way to "bleed" the baseboards of air? Is this necessary? I know it is on older radiators.

Is there a proper formula to figure out what water temperature to use based on the outside temperature? Would this increase or decrease boiler efficiency?
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Old 01-09-2010, 06:20 PM   #4
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Hot water baseboards noisy!


Unless you have no heat or here a lot of air gurgling in the lines you shuold not need to bleed the lines.

Without figuring a heat load and knowing the amount of radiation you have we can guesstimate with
standard copper tube baseboard that at 60deg outside to use about 110deg water.
Then at the other end of a plot line at -10deg outside the water should be about 190deg.

draw a plot line and find the coresponding water temp at the assoiated outdoor temp. the lower the temp the better but if you go to low you will not have enough heat.

Outdoor temp
-10
0
10
20
30
40
50
60
70
120 130 140 150 160 170 180 190 200 Water temp
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Old 01-10-2010, 02:41 PM   #5
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Hot water baseboards noisy!


Quote:
Originally Posted by JohnH1 View Post
Look to see how the elements are mounted. Make suer they are just setting on the brackets to allow for movement.
John, what did you mean by this exactly? Thanks.
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Old 01-10-2010, 06:46 PM   #6
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Hot water baseboards noisy!


I have seen a few times the elements zip-tied to the brackets.
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Old 01-10-2010, 06:49 PM   #7
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Hot water baseboards noisy!


Ah, OK. by elements...is that the pipe running through the baseboard, or the fins?
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Old 01-10-2010, 06:59 PM   #8
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Hot water baseboards noisy!


The element is a copper pipe with aluminum fins attached/pressed to the copper. The fins will be open on the top and bottom allowing air to flow through with a chimney effect.

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